/* *
 *
 *  Dependency wheel module
 *
 *  (c) 2018-2020 Torstein Honsi
 *
 *  License: www.highcharts.com/license
 *
 *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
 *
 * */
'use strict';
import H from '../parts/Globals.js';
import U from '../parts/Utilities.js';
import '../parts/Options.js';
import '../mixins/nodes.js';

var animObject = U.animObject, seriesType = U.seriesType;
var base = H.seriesTypes.sankey.prototype;
/**
 * @private
 * @class
 * @name Highcharts.seriesTypes.dependencywheel
 *
 * @augments Highcharts.seriesTypes.sankey
 */
seriesType('dependencywheel', 'sankey',
    /**
     * A dependency wheel chart is a type of flow diagram, where all nodes are
     * laid out in a circle, and the flow between the are drawn as link bands.
     *
     * @sample highcharts/demo/dependency-wheel/
     *         Dependency wheel
     *
     * @extends      plotOptions.sankey
     * @exclude      dataSorting
     * @since        7.1.0
     * @product      highcharts
     * @requires     modules/dependencywheel
     * @optionparent plotOptions.dependencywheel
     */
    {
        /**
         * The center of the wheel relative to the plot area. Can be
         * percentages or pixel values. The default behaviour is to
         * center the wheel inside the plot area.
         *
         * @type    {Array<number|string|null>}
         * @default [null, null]
         * @product highcharts
         */
        center: [null, null],
        curveFactor: 0.6,
        /**
         * The start angle of the dependency wheel, in degrees where 0 is up.
         */
        startAngle: 0
    }, {
        orderNodes: false,
        getCenter: H.seriesTypes.pie.prototype.getCenter,
        /* eslint-disable valid-jsdoc */
        /**
         * Dependency wheel has only one column, it runs along the perimeter.
         * @private
         */
        createNodeColumns: function () {
            var columns = [this.createNodeColumn()];
            this.nodes.forEach(function (node) {
                node.column = 0;
                columns[0].push(node);
            });
            return columns;
        },
        /**
         * Translate from vertical pixels to perimeter.
         * @private
         */
        getNodePadding: function () {
            return this.options.nodePadding / Math.PI;
        },
        createNode: function (id) {
            var node = base.createNode.call(this, id);
            node.index = this.nodes.length - 1;
            /**
             * Return the sum of incoming and outgoing links.
             * @private
             */
            node.getSum = function () {
                return node.linksFrom
                    .concat(node.linksTo)
                    .reduce(function (acc, link) {
                        return acc + link.weight;
                    }, 0);
            };
            /**
             * Get the offset in weight values of a point/link.
             * @private
             */
            node.offset = function (point) {
                var offset = 0, i, links = node.linksFrom.concat(node.linksTo), sliced;

                /**
                 * @private
                 */
                function otherNode(link) {
                    if (link.fromNode === node) {
                        return link.toNode;
                    }
                    return link.fromNode;
                }

                // Sort and slice the links to avoid links going out of each
                // node crossing each other.
                links.sort(function (a, b) {
                    return otherNode(a).index - otherNode(b).index;
                });
                for (i = 0; i < links.length; i++) {
                    if (otherNode(links[i]).index > node.index) {
                        links = links.slice(0, i).reverse().concat(links.slice(i).reverse());
                        sliced = true;
                        break;
                    }
                }
                if (!sliced) {
                    links.reverse();
                }
                for (i = 0; i < links.length; i++) {
                    if (links[i] === point) {
                        return offset;
                    }
                    offset += links[i].weight;
                }
            };
            return node;
        },
        /**
         * @private
         * @todo Override the refactored sankey translateLink and translateNode
         * functions instead of the whole translate function.
         */
        translate: function () {
            var options = this.options, factor = 2 * Math.PI /
                (this.chart.plotHeight + this.getNodePadding()), center = this.getCenter(),
                startAngle = (options.startAngle - 90) * H.deg2rad;
            base.translate.call(this);
            this.nodeColumns[0].forEach(function (node) {
                // Don't render the nodes if sum is 0 #12453
                if (node.sum) {
                    var shapeArgs = node.shapeArgs, centerX = center[0], centerY = center[1], r = center[2] / 2,
                        innerR = r - options.nodeWidth, start = startAngle + factor * shapeArgs.y, end = startAngle +
                        factor * (shapeArgs.y + shapeArgs.height);
                    // Middle angle
                    node.angle = start + (end - start) / 2;
                    node.shapeType = 'arc';
                    node.shapeArgs = {
                        x: centerX,
                        y: centerY,
                        r: r,
                        innerR: innerR,
                        start: start,
                        end: end
                    };
                    node.dlBox = {
                        x: centerX + Math.cos((start + end) / 2) * (r + innerR) / 2,
                        y: centerY + Math.sin((start + end) / 2) * (r + innerR) / 2,
                        width: 1,
                        height: 1
                    };
                    // Draw the links from this node
                    node.linksFrom.forEach(function (point) {
                        if (point.linkBase) {
                            var distance;
                            var corners = point.linkBase.map(function (top, i) {
                                var angle = factor * top, x = Math.cos(startAngle + angle) * (innerR + 1),
                                    y = Math.sin(startAngle + angle) * (innerR + 1), curveFactor = options.curveFactor;
                                // The distance between the from and to node
                                // along the perimeter. This affect how curved
                                // the link is, so that links between neighbours
                                // don't extend too far towards the center.
                                distance = Math.abs(point.linkBase[3 - i] * factor - angle);
                                if (distance > Math.PI) {
                                    distance = 2 * Math.PI - distance;
                                }
                                distance = distance * innerR;
                                if (distance < innerR) {
                                    curveFactor *= (distance / innerR);
                                }
                                return {
                                    x: centerX + x,
                                    y: centerY + y,
                                    cpX: centerX + (1 - curveFactor) * x,
                                    cpY: centerY + (1 - curveFactor) * y
                                };
                            });
                            point.shapeArgs = {
                                d: [
                                    'M',
                                    corners[0].x, corners[0].y,
                                    'A',
                                    innerR, innerR,
                                    0,
                                    0,
                                    1,
                                    corners[1].x, corners[1].y,
                                    'C',
                                    corners[1].cpX, corners[1].cpY,
                                    corners[2].cpX, corners[2].cpY,
                                    corners[2].x, corners[2].y,
                                    'A',
                                    innerR, innerR,
                                    0,
                                    0,
                                    1,
                                    corners[3].x, corners[3].y,
                                    'C',
                                    corners[3].cpX, corners[3].cpY,
                                    corners[0].cpX, corners[0].cpY,
                                    corners[0].x, corners[0].y
                                ]
                            };
                        }
                    });
                }
            });
        },
        animate: function (init) {
            if (!init) {
                var duration = animObject(this.options.animation).duration, step = (duration / 2) / this.nodes.length;
                this.nodes.forEach(function (point, i) {
                    var graphic = point.graphic;
                    if (graphic) {
                        graphic.attr({opacity: 0});
                        setTimeout(function () {
                            graphic.animate({opacity: 1}, {duration: step});
                        }, step * i);
                    }
                }, this);
                this.points.forEach(function (point) {
                    var graphic = point.graphic;
                    if (!point.isNode && graphic) {
                        graphic.attr({opacity: 0})
                            .animate({
                                opacity: 1
                            }, this.options.animation);
                    }
                }, this);
            }
        }
        /* eslint-enable valid-jsdoc */
    },
// Point class
    {
        setState: H.NodesMixin.setNodeState,
        /* eslint-disable valid-jsdoc */
        /**
         * Return a text path that the data label uses.
         * @private
         */
        getDataLabelPath: function (label) {
            var renderer = this.series.chart.renderer, shapeArgs = this.shapeArgs,
                upperHalf = this.angle < 0 || this.angle > Math.PI, start = shapeArgs.start, end = shapeArgs.end;
            if (!this.dataLabelPath) {
                this.dataLabelPath = renderer
                    .arc({open: true})
                    // Add it inside the data label group so it gets destroyed
                    // with the label
                    .add(label);
            }
            this.dataLabelPath.attr({
                x: shapeArgs.x,
                y: shapeArgs.y,
                r: (shapeArgs.r +
                    (this.dataLabel.options.distance || 0)),
                start: (upperHalf ? start : end),
                end: (upperHalf ? end : start),
                clockwise: +upperHalf
            });
            return this.dataLabelPath;
        },
        isValid: function () {
            // No null points here
            return true;
        }
        /* eslint-enable valid-jsdoc */
    });
/**
 * A `dependencywheel` series. If the [type](#series.dependencywheel.type)
 * option is not specified, it is inherited from [chart.type](#chart.type).
 *
 * @extends   series,plotOptions.dependencywheel
 * @exclude   dataSorting
 * @product   highcharts
 * @requires  modules/dependencywheel
 * @apioption series.dependencywheel
 */
/**
 * A collection of options for the individual nodes. The nodes in a dependency
 * diagram are auto-generated instances of `Highcharts.Point`, but options can
 * be applied here and linked by the `id`.
 *
 * @extends   series.sankey.nodes
 * @type      {Array<*>}
 * @product   highcharts
 * @excluding offset
 * @apioption series.dependencywheel.nodes
 */
/**
 * An array of data points for the series. For the `dependencywheel` series
 * type, points can be given in the following way:
 *
 * An array of objects with named values. The following snippet shows only a
 * few settings, see the complete options set below. If the total number of data
 * points exceeds the series' [turboThreshold](#series.area.turboThreshold),
 * this option is not available.
 *
 *  ```js
 *     data: [{
 *         from: 'Category1',
 *         to: 'Category2',
 *         weight: 2
 *     }, {
 *         from: 'Category1',
 *         to: 'Category3',
 *         weight: 5
 *     }]
 *  ```
 *
 * @type      {Array<*>}
 * @extends   series.sankey.data
 * @product   highcharts
 * @excluding outgoing, dataLabels
 * @apioption series.dependencywheel.data
 */
/**
 * Individual data label for each node. The options are the same as
 * the ones for [series.dependencywheel.dataLabels](#series.dependencywheel.dataLabels).
 *
 * @apioption series.dependencywheel.nodes.dataLabels
 */
''; // adds doclets above to the transpiled file
